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Based on the market demand of car air conditioning system performance,the performance evaluation systemfor the car air conditioning is constructed and the weights of performance evaluation indexes of different car ranks are determined by Analytic Hierar-chy Process(AHP).According to the test database and evaluation of professional staff,evaluation standard of each evaluation item is formulated and a comprehensive evaluation model for car air conditioning system performance is established.The performance of the air conditioning systems is evaluated by using this model in the specific car development projects of different grades.The result shows that it is feasible to evaluate the performance of car air conditioning systems by using this model,and it could be a better auxiliary to the devel-opment of car air conditioning systems.